PNG Decoder

[jerion]

Hello everybody, this is my first post here, but I have been looking these forums for a while.

Here is my first attempt at decoding images. This is a small class that can decode bytearrays from png images and transfrom that bytearray to a bitmapdata. It is very limited right now, it can only decode truecolour with alpha png images with no interlacing, no filter, and bit depth of 8.

The reason I did this was to avoid using the Loader.loadBytes() method, since I needed a faster way to load lots of small png images at the same time that are read by Flash as raw bytes.

If you have any suggestions, please let me know.

[Anogar]

This is actually pretty awesome. The unfortunate thing is that it's like 50x slower than loadBytes(), as far as I can tell. Heh. Good stuff though. :thumb:

[Dom_]

pretty cool class

[getfile]

try

[hariranjit]

Can u pls guide me how to give image source in PngDecoder.as using php?
Thanks

[pippy]

While this is a great script, I found it often failed on variable bit depths. After a bit of researching I found flash has an inbuilt PNG decoder, but it's asynchronous. This solution takes in two paramaters , a byte array and a callback function (that takes in a bitmapData):



package com.deadlydiddle.util {
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.utils.ByteArray;
import flash.display.Loader;
import flash.events.Event;

public class ImageDecoder
{
private var loader:Loader = new Loader();
public var loading:Boolean;

/**
* Constructor - Creates a new Image decoder
* Decodes the byte array byteData, and when done calls callBack with the BitmapData
*/
public function ImageDecoder(byteData:ByteArray, callBack:Function) {
loading = true;
loader.contentLoaderInfo.addEventListener(Event.CO MPLETE,
function(e:Event){
loading = false;
var decodedBitmapData:BitmapData = Bitmap(e.target.content).bitmapData;
callBack(decodedBitmapData);
});
loader.loadBytes(byteData);
}
}
}

[garjones]

Booyah booyah booyah.

[garjones]

Aye, have you thought about using Scaleform?